Stamp-mill.



PATENTED DEC. 11, 1906.

P. KIRKEGAARD.

STAMP MILL.

APPLICATION FILED SEPT.17, 1904.

INVENTOR j WITNESSES:

I r r ATTORNEYS PETER KIRKEGAARD, OF DELORO, ONTARIO, CANADA.

STAMP-MILL.

Specification of Letters Patent.

Patented Dec. 11, 1906.

Application filed September 1'7, 1904. Serial No. 224,884.

To all whom it ntcty concern:

Be it known that 1, PETER KIRKEGAARD, a citizen of the United States, residing at Deloro, in the county of Hastings and Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Stamp-Mills, of which the following is a full, clear, and exact description.

The object of the present invention is to provide quick, safe, and reliable means for hanging up-or suspending the stamps of a stamp-mill, so as to throw the stamps out of action with the cam at any time, as may be required in the working of a stamp-mill. Under the present practice this hanging up is accomplished by means of a wedge inserted between the face of the tappet and the cam while the latter is revolving, thereby lifting the tappet, which for the time being is integral with the stamp, to a height sufficient for the insertion of a wooden rod, commonly called a finger. The wedge is held in the hand of the operator, and the act of hanging up stamps by this method is both difficult and dangerous, particularly so if the face of the tappet or cam is worn to an uneven surface or if the tappet slips, in which case there is no space left for the insertionof the wedge.

The present invention is designed to obviate the danger and difficulty of this operation, eliminating the wedge altogether, and to otherwise facilitate the handling of stamps, and thereby to add to their efliciency through a saving in time in their manipulation.

The invention will be readily understood by reference to the accompanying drawings, in which the stamp-stem, the tappet, and the lifting-cam are shown in relative position to each other and to my improved lifter.

In the drawings, Figure 1 shows the usual cam lifting the tappet, in combination with my improved lifter placed under the tappet before the cam leaves it. Fig. 2 illustrates the position of the parts when the tappet is 4 raised to its highest position by my lifter,

the cam being clear from the tappet. Fig. 3 shows my lifter removed and clear of the tappet, leaving the stamp free to rise or fall. Figs. 4, 5, and 6 are separate views of my lifter shown in enlarged form and in different positions as applied to a stamp, and Figs. 7 and 8 are detail views.

Referring to the first three figures of the drawings, 1 is a stamp-stem having a tappet 2 secured thereon. The lifting-cam is shown rest when out of at 3 and is of the ordinary type, constituting no part of the present invention, being merely illustrated to show the application of my lifter 4 to the purposes of the present invention. The lifter 4 is so constructed that it can be employed in connection with the usual jack-shaft 5 and in the socket or foot 6, as now universally used.

The action of the cam is to lift the stamp by means of the tappet to a height equal to the length of the cam and then permit the stamp to drop by means of its own weight. The lifter 4 when down is made of a length slightly shorter than the lift of the cam, so that it will drop freely under the tappet when the cam brings it to its highest position and then by bringing the segment to its highest limit will raise the tappet clear of the cam.

The general operation is clearly enough indicated in Figs. 1, 2, and 3.

In Fig. 4 the lifter is shown in enlarged views, the same consisting, essentially, of the following parts: At 7 is shown the Wedge or segment employed for the purpose of raising the upper or telescope part of the lifter, and with it the tappet 2, clear of the cam. The fulcrum on which the segment revolves is shown at 8, and the arm connected with the fulcrum appears at 21. The segment is provided with a handle 9 for raising or lowering it as occasion arises, and this handle is preferably made an integral part of the segment, but may be made independent thereof, if de sired. The rollers 10 and 11, below and above the segment, are for the pur o'se of reducing friction. The part 12 is tl fe stem of the moving or telescoping part of the lifter. Around the stem 12 is a sleeve 13, on which is a ring or collar 14 for adding strength to this part of the device when the same is made from wood or other material needing such reinforcement. Above the ring 14 is a collar 15, connected with a head-piece 16, which bears against the under side of the tappet 2. The collar 15is intended as apart uponwhich the movable portion of the apparatus may action and is further intended for taking up the shock or blow caused by the stamp dropping on it when the cam leaves the tappet after the lifting process. This collar 15 may be lengthened and serve as the head-piece, if desired. The head-piece 16, upon wiich the tappet rests when the lifter is in use, is beveled to conform to the angle of the lifter as related to the tappet, as shown in Figs. 1 and 2. This head-piece the disengagement takes may be made in one piece with the collar 15 and stem 12 or separately of wood or rubber, as preferred. At 6 is shown a socket in which the lifter can be made to fit, and at 5 is the jackshaft, upon which the socket rests.

The operation of the lifter and its parts will be obvious from the foregoing description.

The operation is asfollows: The head 16 of the lifter is placed beneath the tappet just at the time when the cam is about to become disengaged from the tappet. When place, the tappet falls upon the head of the lifter. The segment 7 is then raised through the medium of the handle 9 until it passes a point marked a; on the segment beyond the roller 11, when the tappet will be at its highest position and clear of the cam. In this position the segment-is secured against slipping back by reason of the fact that from the oint 00 toward the handle the arc of the circ e makes this a downwardly-inclined plane, for which reason the roller 11 tends with the weight of the stamp upon it to roll toward the handle 9. The point x is clearly shown in Fig. 8. This is an important feature of the invention and jointly with the segment formed as a wedge makes the raising of a heavy weight, such as a stamp, a very easy and simple operation. When the handle is made in a separate piece from the wedge 7, as illustrated at 90 in Figs. 5 and 8, the said handle only begins to bear upon the wedge at a certain point, as indicated by the dotted lines in the last-named figure. In this case the inner end of the handle is made in the form of a yoke surrounding the Wedge or segment 7, as will be readily understood.

I claim as my invention A means for hanging up the stam s of stamp-mills, comprising a tube or s eeve, hinged at a fixed point on the stamp-mill and arranged to swing into the path of the tappet thereof, a rod telescoping therein and having a roller within the sleeve, a cam pivoted within the sleeve and acting through the wall thereof on said roller, and. a handle whereby. the sleeve is initially located beneath the tappet and the rod subsequently projected therefrom by the cam so as to lift the tappet into inoperative relation.

In Witness whereof I subscribe my signature in the presence of two witnesses.

PETER KIRKEGAARD.

Witnesses:

W. A. HUNGERFORD, G. FRANK FRrEs. 

